/Engine/Source/Runtime/Engine/Classes/Kismet/BlueprintPathsLibrary.h
Converts a normal path to a sandbox path (in Saved/Sandboxes).
static [FString](API\Runtime\Core\Containers\FString) ConvertToSandboxPath ( const [FString](API\Runtime\Core\Containers\FString) & InPath, const [FString](API\Runtime\Core\Containers\FString) & InSandboxName )